22 results about "Mixed oxide" patented technology

An electret (1) is formed by subjecting an inorganic dielectric body (2) to a charging process. The inorganic dielectric body (2) is composed of a metal compound containing at least either Al or Mg, and the total mole fraction of Al and Mg among all the metal elements contained in the metal compound is greater than 50%. The metal compound may contain a metal oxide or a metal salt and may be an Al-containing oxide or salt, a Mg-containing oxide or salt, or a mixed oxide containing both Al and Mg.

The present disclosure relates generally to supported CO2 conversion catalyst comprising: a support that is a cerium oxide support, a titanium oxide support, an aluminum oxide support, a zirconium oxide support, a zinc oxide support, a silicon oxide support, or a mixed oxide support comprising a mixture of two or more of cerium oxide, titanium oxide, aluminum oxide, zirconium oxide, zinc oxide, and silicon oxide; at least one of copper, iron, platinum palladium, zinc, and manganese, present in an amount in the range of 0.05 to 15 wt% of the catalyst, based on the total weight of the catalyst; and at least one of tellurium, bismuth, tin, antimony, germanium, selenium, arsenic, boron, indium, and silicon present in an amount in the range of 0.05 to 15 wt% of the catalyst, based on the total weight of the catalyst.

This application relates to the field of electrochemical energy storage materials technology, and more particularly to a negative electrode material, its preparation method, and its application. The negative electrode material comprises a mixed oxide, the general chemical formula of which is shown in Formula 1, M... 2±α A 0.5n‑x M1 x Nb n‑y M2 y O 3n+1‑δ Q δ Formula 1; the M site element is a doping element of at least one of Li, H, Na, K, and Rb; the A site element includes Sr and / or Ca; the M1 site element includes at least one of Mg and rare earth elements; the M2 site element is a transition element; the Q site element includes at least one of halogen elements, N, and S; stoichiometric constants: 0≤α≤0.5, 0≤x≤0.5, 0≤y≤1.0, 0≤δ≤0.5, and 2≤n≤4, where α, x, and y are not simultaneously 0. This anode material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

This invention belongs to the field of aromatic ring hydrogenation catalyst technology, and relates to a mixed oxide supported ultra-low ruthenium-based catalyst, its preparation method, and its application. This invention improves the acidic sites at the catalyst surface by controlling the proportion of the metal oxide support. Simultaneously, it utilizes the mesoporous structure and high specific surface area of ​​the support, and leverages the ruthenium catalytic active sites at the hydroxyl coordination sites on the support surface to effectively avoid the problem of catalytic metal aggregation and deactivation. This enhances the stability of the active metal in the catalytic material, inhibits its aggregation during the reaction, and thus significantly reduces the ruthenium loading of the catalyst. Ultimately, it obtains a catalytic system with high conversion, high selectivity, high TON value, and high TOF value, meeting the atom economy and environmental friendliness requirements of industrial production.

Cu / M has been developed 2+ M 3+ Oxide or CuO / M 2+ M 3+ The oxide catalyst is used to produce isobutanol in propanol-methanol, ethanol-methanol, and propanol / ethanol mixture-methanol reactions. This catalyst can also be used to produce n-butanol in ethanol-ethanol reactions. The Cu / M 2+ M 3+ Oxide or CuO / M 2+ M 3+ The oxide catalyst has an average Cu or CuO particle size greater than or equal to 20 nm. 2+ It may contain divalent magnesium, calcium, strontium, barium, zinc, or combinations thereof. M 3+ It may contain trivalent aluminum, gallium, chromium, or combinations thereof. A catalyst, a method for manufacturing the catalyst, and a method for using the catalyst are described.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

Disclosed herein are mixed oxide compositions containing mixed oxides of lanthanum, aluminum, a mixture of iron and strontium. These compositions optionally also may contain additional rare earth dopants that are not cerium, alkaline earth dopants, and transition metal dopants. These mixed oxide compositions surprisingly exhibit enhanced oxygen storage capacity (OSC) when measured at temperatures between 350° C. and 800° C., in particular between 450° C. and 800° C., even after aging at elevated temperatures. These mixed oxide compositions importantly contain a primary perovskite phase, which in one embodiment is LaAlO3, and a secondary perovskite phase, which in one embodiment comprises a lanthanide, a transition metal, and alkaline earth mixed oxide. The compositions may be used as catalytic carriers which may be used in gas exhaust purification catalysts and / or as CO2 conversion catalysts.

The present invention relates to a material comprising porous microspheres based on actinide oxides, obtained by an internal gelation method. The present invention also relates to the use of this material as a sintering additive in the production of nuclear fuel, particularly in the production of MOX (mixed oxide) type nuclear fuel pellets, and more specifically as a pore-forming agent to replace conventionally used pore-forming agents in said production, namely azodicarbonamides.

The application provides a catalyst for synergistically removing toluene and NOx, a preparation method and application thereof, and belongs to the technical field of atmospheric pollution control. The catalyst comprises a MnCuTi mixed oxide, has a particle size of 250-380 mu m, a specific surface area of 155.10-164.25 m 2 / g, a pore volume of 0.270-0.281 cm 3 / g, and an average pore size of 6.672-6.951 mm. The preparation method comprises the following steps: mixing copper nitrate, manganese nitrate solution, deionized water and glacial acetic acid with ethanol to obtain solution A; dissolving tetrabutyl titanate in ethanol to obtain solution B; adding solution B into solution A drop by drop under stirring to form a sol and continuing to stir; aging, drying, grinding and calcining; and tabletting and sieving to obtain the catalyst. The catalyst is used for synergistically removing toluene and NOx, has low raw material cost, simple and controllable preparation process, strong repeatability, good catalytic activity and high selectivity.

This invention provides a solid-liquid phase O-alkylation reaction catalyst and its preparation method. The catalyst consists of an organic compound, a metal oxide, and excipients; the metal oxide is a magnesium-aluminum mixed oxide, the organic compound is sulfonated chitosan, and the excipients are a silane coupling agent, methylsilane, anhydrous toluene, anhydrous ethanol, deionized water, glacial acetic acid solution, sodium hydroxide solution, and anhydrous dichloromethane. The sulfonated chitosan is chemically loaded onto the magnesium-aluminum mixed oxide, ensuring the catalyst possesses dual acid-base catalytic centers, improving the reactivity of the raw materials, enhancing the catalyst's stability, facilitating post-reaction separation, and extending its cycle life.

Method for producing a resistive particle sensor (1) for detecting particles in a gas stream, wherein the particle sensor (1) comprises an electrode system (2) of at least two electrodes (3, 4) and at least one semiconducting material (5), wherein the semiconducting material (5) contacts the electrodes (3, 4), wherein the semiconducting material (5) is at least one oxide selected from the group consisting of rare-earth-rare-earth mixed oxides, rare-earth-zirconium mixed oxides, alkaline-earth-zirconium mixed oxides, transition-metal-zirconium mixed oxides, rare-earth-aluminum mixed oxides, alkaline-earth-aluminum mixed oxides, transition-metal-aluminum mixed oxides, rare-earth-titanium mixed oxides, barium-titanium mixed oxides, transition-metal-titanium mixed oxides, rare-earth-indium mixed oxides, Alkaline earth indium mixed oxides, transition metal indium mixed oxides, rare earth zinc mixed oxides, alkaline earth zinc mixed oxides, transition metal zinc oxide mixed oxides, samarium oxide, yttrium oxideTerbium oxide and / or mixtures thereof, comprising, wherein a voltage is applied to the electrodes (3, 4) and the semiconducting material (5) under an atmosphere free of oxidizing and / or reducing agents, the voltage being selected such that at least one metal of the semiconducting material (5) is at least partially reduced or oxidized in the regions of the semiconducting material (5) which contact the electrodes (3, 4), characterized in that both electrodes (3, 4) are connected simultaneously at the same potential relative to the semiconducting material (5).

The application discloses a modification method of micro-nano oxide powder, and belongs to the technical field of powder material modification. The method comprises the following steps: adding the micro-nano oxide powder into a mixed solution of a hydrophobic modifier and water, uniformly stirring and mixing to form an oxide slurry; after curing the mixed oxide slurry at a certain temperature, separating and drying to obtain a hydrophobic modified micro-nano oxide powder; and adding the obtained hydrophobic modified micro-nano oxide powder into a mixed solution of a hydrophilic modifier and water to prepare a micro-nano oxide powder with internal hydrophobicity and external hydrophilicity. The micro-nano oxide powder is modified twice on the surface by adjusting the micro-nano oxide powder modifier and ratio, curing temperature and time, and selecting a drying mode, so that the micro-nano oxide powder with internal hydrophobicity and external hydrophilicity is obtained. The modification method is simple and efficient, and the modified micro-nano oxide powder has uniform particle size and outstanding modification effect.

The application discloses a method for preparing nano copper-tungsten alloy powder by nitriding and denitrogenation. The method specifically comprises the following steps: taking copper nitrate and ammonium metatungstate as raw materials, mixing the two according to a proportion, and then obtaining a uniform mixed liquid by using a water bath heating mode; drying the mixed liquid in a blast drying oven to obtain a precursor powder; calcining the precursor powder in a muffle furnace to obtain a mixed oxide; and placing the mixed oxide in a tube furnace to obtain nano copper-tungsten powder by nitriding and denitrogenation. The method can obtain a large amount of precursor by using a liquid-liquid mixing and calcining process, and the subsequent nitriding and decomposition process is completed in one step in the tube furnace, and the nano copper-tungsten powder with an oxygen content of not more than 500 ppm can be directly obtained by furnace cooling. The method effectively improves the production efficiency of the nano powder, and enables batch production of the nano powder. The powder preparation process and equipment are simple, and industrial production can be implemented.

The present disclosure relates generally to supported CO2 conversion catalyst comprising: a support that is a cerium oxide support, a titanium oxide support, an aluminum oxide support, a zirconium oxide support, a zinc oxide support, a silicon oxide support, or a mixed oxide support comprising a mixture of two or more of cerium oxide, titanium oxide, aluminum oxide, zirconium oxide, zinc oxide, and silicon oxide; at least one of cobalt, nickel, ruthenium, and rhodium, present in an amount in the range of 0.05 to 16 wt% of the catalyst, based on the total weight of the catalyst; and at least one of tellurium, bismuth, tin, antimony, germanium, selenium, arsenic, boron, indium, and silicon present in an amount in the range of 0.05 to 15 wt% of the catalyst, based on the total weight of the catalyst.

A multi-phase catalyst structure for reducing nitrous oxide emissions in exhaust streams is disclosed. The structure includes a primary phase with nickel-copper alloy nanoparticles (10-50 nm, Ni: Cu ratio 3:1 to 4:1) supported on modified alumina (150-200 m2 / g) and a manganese oxide promoter; a secondary phase with iron-chromium oxide spinel particles supported on silicon carbide (0.6-0.8 cm3 / g) and a zinc oxide modifier; and a tertiary phase with copper-cobalt mixed oxides supported on titanium dioxide (2-50 nm pore size) and a magnesium oxide stabilizer. Interface regions optimize gas flow and phase interactions, while a distributed pore structure facilitates efficient gas diffusion. The system achieves at least 90% nitrous oxide reduction efficiency under optimal conditions using sustainable materials. Additionally, apparatuses for exhaust gas flow optimization and thermal management are disclosed, featuring smart flow architectures, uniform heat distribution, emergency cooling channels, and phase-change material chambers for enhanced catalytic performance and durability.

The present invention relates to the technical field of catalysts, and in particular relates to a dehydrogenation catalyst precursor, a dehydrogenation catalyst, and a preparation method therefor and the use thereof. In the dehydrogenation catalyst precursor, a sulfur-modified magnesium-aluminum mixed oxide is used as a carrier, and a Pt metal cluster is used as an active center, wherein the carrier is a mixed-state metal oxide having a synergistic structure combining a layered hydrotalcite structure, a spinel structure, and a nearly crystalline state. In the present invention, a magnesium-aluminum mixed oxide can be prepared by introducing a precursor of alkali metal magnesium into an aluminum oxide precursor. By regulating the calcination temperature, either a hydrotalcite-like layered structure or a spinel structure can be formed. In combination with surface regulation and modification on the carrier, the capability of regulating and controlling the interaction between a metal and a carrier can be improved, which is beneficial for maintaining the cluster active centers and for tuning the surface acid–base properties of the carrier surface, thereby reducing carbon deposition and improving the activity and stability of the catalyst.

The present invention discloses an antireflection and antireflection film and a preparation process thereof. The antireflection and antireflection film includes a substrate layer, a flexible transition layer, a first antireflection layer, a second antireflection layer, a third antireflection layer, a fourth antireflection layer, and a fifth antireflection layer which are sequentially stacked; the refractive index of the first antireflection layer is n1, the refractive index of the second antireflection layer is n2, the refractive index of the third antireflection layer is n3, the refractive index of the fourth antireflection layer is n4, and the refractive index of the fifth antireflection layer is n5, satisfying: n1 < n2 < n3, and n5 < n4 < n3; the material of the flexible transition layer is amorphous silicon carbide; the material of the first antireflection layer is a mixed oxide of silicon and aluminum; the material of the second antireflection layer is a mixed oxide of silicon and niobium; the material of the third antireflection layer is a mixed oxide of silicon, niobium and yttrium; the material of the fourth antireflection layer is a mixed oxide of silicon and zirconium; the material of the fifth antireflection layer is silicon dioxide. The present invention adopts a magnetron sputtering process and optimizes process parameters to solve the problems of rainbow patterns and poor bending resistance.

A polyurethane foam, including a transition metal oxide. The transition metal oxide is selected from a group consisting of: WO2, WO3, MoO2, MoO3; and mixtures thereof, hydrates and acids derived from WO2, WO3, MoO2, and / or MoO3 and mixtures thereof; mixed oxide of general formula MoxW1-xMyOz, where M is a cation selected from Na, Cu, Ti, Bi, V, and Zn, where 0≤x≤1, 0≤y≤2, 2≤z≤3, and mixtures thereof; hydrates and acids of general formula MoxW1-xMyOz·nH2O, where M is a cation selected from Na, Cu, Ti, Bi, V, and Zn, where 0≤x≤1, 0≤y≤2, 2≤z≤3, and n describes a number of water molecules, and mixtures thereof; salts of molybdic acid of general formula NnMoO4, salts of tungstic acid of general formula NnWO4, where N is a cation selected from Na, K, Mg, Ca, Ag, Cu, Bi, V, Ti, Zn, where 1≤n≤2, and mixtures thereof; and mixtures of the transition metal oxides.

The present invention describes the preparation of heterogeneous catalysts of mixed oxides based upon niobium and mixed oxides of zinc, manganese, nickel, cobalt and / or aluminum, originating from hydrotalcites (HTs) as precursor phase of heterogeneous catalysts, and application thereof in the chemical recycling of poly(ethylene terephthalate) (PET) for the production of metal free bis(hydroxy)ethylene (BHET) monomers and oligomers having a processing performance similar to that of the homogeneous catalysis system.

A catalyst may include ruthenium, oxygen, and a dopant, wherein the dopant comprises a transition metal. The catalyst may further include iridium. A method of making the catalyst may include impregnating ruthenium precursors and dopant precursors on a support, reducing the ruthenium precursors and the dopant precursors to obtain alloy nanoparticles supported on the support and including an alloy of ruthenium and the dopant, annealing the alloy nanoparticles and the support to remove the support and to convert the alloy nanoparticles to an intermediate mixed oxide including ruthenium, oxygen and the dopant, and leaching the intermediate mixed oxide to remove unstable dopant and obtain the catalyst.

This invention discloses a method for modifying and repairing waste lithium iron phosphate (LFP) cathode materials with tetrabutyl silicate and its application in the deep-sea field. The method involves ultrasonically and drying the waste LFP cathode material; ball milling the dried material to obtain LFP powder; mixing the LFP powder with tetrabutyl silicate in anhydrous ethanol and ball milling again to obtain a mixed material; drying the mixed material and then heating it to 450-550°C for oxidation treatment to obtain a mixed oxide; mixing the mixed oxide, lithium carbonate, and glucose and ball milling to obtain a mixed powder sample; heating the powder sample to 650-750°C and holding it for high-temperature solid-state sintering to obtain the repaired LFP cathode material. The tetrabutyl silicate-modified LFP cathode material prepared by this invention can be applied in the deep-sea marine field.